Foil, emboss, and sometimes UV files are best as vector art. Raster images are not preferred by die makers because they require clean edges. If you have to create them in Photoshop and cannot draw a vector image, you will need to submit your file and have a discussion with our diemaker as to what to expect with your finished product. Varnishes can be raster or vector.
All of these should be submitted as a separate file or layer with the color set to either 100% black or a solid overprinting spot color with a color name stating what it is.